docs: def sockets(self):
          """
          Return a single socket which is processing all I/O to exec
          """
          socket = self.client.exec_start(self.exec_id, socket=True, tty=self.interactive)
          stream = io.Stream(socket)
          if self.is_process_tty():
              return stream
          else:
              return io.Demuxer(stream)